This man's expedition to 
This man's expedition to Vietnam won the submission of the Champa people. This man's troops crushed the remnants of the previous dynasty at Yamen, and he enforced the use of a paper currrency called chao. This man created a capital at Dadu, which is now Beijing. This man used the kurultai of Shang-tu to preempt his brother Arigboke, and he rose to power after his brother [*] Mongke's death. This man's expeditions to Japan were stymied by the kamikaze. The conqueror of the Song dynasty, for 10 points, name this Yuan dynasty Mongol emperor and grandson of Genghis Khan who welcomed Marco Polo to China.
This man's expedition to Vietnam won the submission of the Champa people.
{Kublai} Khan [or {Khubilai} Khan; prompt on “{Khan}”]